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Instruction: Describe the 3D printing process

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3D printing is a process in which a three-dimensional object is built layer by layer using a computer-aided design (CAD) program, instead of using traditional techniques to make the object. In 3D printing, a 3D model is designed, either in STL file format or another 3D program. The file is then loaded into a 3D printer, where it is printed layer by layer with special material. The material is heated and applied in thin layers over the course of the printing process. The result is a 3D object that can be used for a variety of applications.